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首页> 外文期刊>Journal of Materials Science >In situ synthesis of high-density contact-free Ag-nanoparticles for plasmon resonance polystyrene nanocomposites
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In situ synthesis of high-density contact-free Ag-nanoparticles for plasmon resonance polystyrene nanocomposites

机译：原位合成等离振子共振聚苯乙烯纳米复合材料的高密度无接触银纳米粒子

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摘要

The fabrication of plasmonic Ag-nanocomposites (PMN) by a high energy-transfer thermal degradation of Ag-acac was reported. Commercial Ag-acac was used to synthesize silver nanoparticles in molten PS. The silver precursor, available in crystalline powder form, was first dissolved in chloroform and then the amorphous polystyrene was added in pellets to the solution. The suspensions obtained in this way were then cast into petri dishes to form films of the same thickness and dried in air at 25°C for several hours to let the solvent fully evaporate. Then, all the samples were thermally annealed on a hot-plate at a constant temperature of 200°C. Before annealing the samples, the thermolysis reaction of the precursor was studied in the presence of air and within the PS matrix to identify the optimal process temperature and duration. The process conditions found guarantee the synthesis of contact-free nanoparticles of size smaller than 40 nm, key element to obtain a single and narrow SPR, and a limited scattering over the whole visible spectrum.
机译：据报道，Ag-acac的高能量转移热降解可制备等离激元Ag-纳米复合材料（PMN）。商业化的Ag-acac用于在熔融PS中合成银纳米颗粒。首先以结晶粉末形式获得的银前体先溶解在氯仿中，然后将无定形聚苯乙烯以颗粒形式加入到溶液中。然后将以此方式获得的悬浮液流延到皮氏培养皿中以形成相同厚度的膜，并在25℃的空气中干燥数小时以使溶剂完全蒸发。然后，将所有样品在热板上于200℃的恒定温度下进行热退火。在对样品进行退火之前，先在空气存在下和在PS基质内研究前体的热分解反应，以确定最佳工艺温度和持续时间。所发现的工艺条件保证了尺寸小于40 nm的无接触纳米粒子的合成，获得单个且较窄SPR的关键元素以及在整个可见光谱范围内的有限散射。

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